html,
body {
  width: 100%;
  height: 100%;
  background-color: #3a5660;
  overflow: hidden;
  position: relative;
}
html .login-box,
body .login-box {
  width: 25%;
  height: 25%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
html .login-box h1,
body .login-box h1 {
  height: 0;
  text-align: center;
  flex-basis: 15%;
  color: white;
}
html .login-box input,
body .login-box input {
  flex-basis: 15%;
  border-radius: 5px;
  padding-left: 10px;
}
html .login-box button,
body .login-box button {
  flex-basis: 15%;
  color: white;
  background-color: #5091fd;
  border-radius: 5px;
  cursor: pointer;
}
